Lifting-jack



(No Model.)

- E. COVERT;

LIFTING JAGK. No. 457,183. Patented Aug. 4, 1891.

UNITED STATES PATENT OFFICE.

ENOCH COVERT, OF FARMER VILLAGE, NEIV YORK.

LlFTlNG-JAC K.

SPECIFICATION forming part of Letters Patent No. 457,183, dated August4, 1891.

Application filed June 5, 1891. Serial No. 395,207. (No model.)

To all whom it may concern:

Be it known that I, ENOGH COVERT. a citizen of the United States,residing at Farmer Village, in the county of Seneca and State of NewYork, have invented certain new and useful Improvements in LiftingJacks, of which the following is a specification, reference being hadtherein to the accompanying drawings, in which Figure 1 represents aperspective View of my improved jack ready for operation; Fig. 2, asimilar View of thejack elevated; and Fig. 3, a horizontal sectionalview of the jack, showing the standard set ecoentrically.

This invention has special reference to that class of lifting-jackscovered by my patent, No. 432,230, dated July 15, 1890; and it has forits object to remedy a serious defect found to exist in the constructionshown in said patent, as will presently appear.

In the drawings, a designates a vertical tubular standard screwed orotherwise secured in a circular or other shaped base 1), said baseconsisting, preferably, of a ring having formed integrally with it aseries of radial arched arms a, supporting the ring or tube' into whichthe standard is screwed. Working in this tubular standard is aliftingbar 0, having attached to its upper end the steppedsupportingbracket d, to the rear edge of which the operating-lever e ispivoted.

. A pair of fulcrum-links f pivotally connect one of the radial arms ofthe base to the lever near its point of connection to theliftingbracket.

The operation of this lifting-jack is apparent from the two views shownin the drawings. The stepped foot or lifting-bracket is placed under theaxle of 'the Vehicle to be lifted or other body and the longer arm of ofthe center.

the lever pressed down, whereupon the lifting-bar and its foot orbracket will be raised and supported in such raised position by thelever and links, as fully set forth in my former patent.

In my former patent the tubular standard is shown set in the center ofthe base and the supporting fulcrum-links pivoted to one side Thisarrangement in practice is found to be objectionable, in that it causesthe jack to tilt or tip when in use. To remedy this objectionablefeature I pivot the supporting-links at or near the center of the baseand secure the standard eccentrically, as at g, as shown clearly in thedrawings. Iuasm uch as the pivotal links are in a vertical position anddo all the work of supporting the load when the jack is in use, it willbe observed that thus pivoting them in or near the center of baseprevents the jack tilting in any direction.

Having thus described my invention, what I claim, anddesire to secure byLetters Patent, is

The combination of a base, a standard secured thereto eccentrically, asat g, a liftingrod guided by the standard and provided with a liftingbracket or foot, a lever pivotally connected to said bracket, a pair ofsupporting fulcrum-links pivotally connecting the lever to the base, thesaid links being pivoted at or near the center of the base, as and forthe purpose described.

In testimony whereof I affix my signature in presence of two Witnesses.

ENOCH COVERT.

\Vitnesses:

D. 0. WHEELER, J. D. WINTERsTEEN.

